Ever wonder just how much caffeine you're ingesting every day? The Caffeine Database's point-and-click calculator will tell you.

The calculator lists nearly 200 popular beverages, everything from A&W Cream Soda to ZipFizz Energy Drink Mix. Just click the little green plus-sign next to each drink you've consumed; a pop-up window calculates your total caffeine intake (along with how you might be feeling after all those drinks). If it seems like too much, maybe you're ready to kick the habit.